Opinium show Khan ahead in mayoral race

It's been almost two months since we've had any polling on the London mayoral race, but Opinium have released a new poll today showing Sadiq Khan still ahead. First round preferences are Khan 31%, Goldsmith 26%, Whittle 2%, Berry 2%, Pidgeon 2%, Galloway <1% (these figures are including don't knows, hence the low scores. Without don't knows it would work out at Khan 48%, Goldsmith 42%, Berry, Whittle and Pidgeon all on 3% and Galloway on 1%.)

Given the low level of support for all the candidates outside the main two Khan is close to winning on the first round anyway, but after asking a forced choice and reallocating preferences between the final two it works out at Khan 55%, Goldsmith 45%. Full tabs are here.